From the course: After Effects CC 2021 Essential Training: VFX
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Isolate elements with different mattes - After Effects Tutorial
From the course: After Effects CC 2021 Essential Training: VFX
Isolate elements with different mattes
- [Instructor] As we've seen so far in this chapter, there's more than one way to create layer transparency for using compositing. Here, we will use the shot that we previously tackled with the roto-brush tool, and instead, we'll use another method to achieve the same result by using a difference matte. With difference mattes, we tell After Effects to look at one layer and compare it with another. Any place that's different will create transparency. So here in our shot, we have the same result, but this time, in this foreground layer, layers two and three, we're deriving transparency by a difference matte. So how do we use this? Let's start with this composition where it's a clean start, and layer five is our clean background plate. We're adding in our fire layers. And, of course, we need to bring back the guy in our foreground, so let's duplicate layer five. We'll rename this foreground FG and put it just underneath the…
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